List of species by family

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Acanthaceae: Dicliptera brachiata (branched foldwing, dicliptera); Justicia americana (water willow); Ruellia humilis (wild petunia, fringeleaf ruellia); Ruellia pedunculata (wild petunia); Ruellia strepens (wild petunia, smooth ruellia, limestone ruellia)
Agavaceae: Manfreda virginica (false aloe, rattlesnake master); Yucca glauca (soapweed); Yucca smalliana (Spanish bayonet, Adam's needle)
Alismataceae: Alisma triviale (northern water plantain); Echinodorus berteroi (tall burhead, cellophane plant); Echinodorus cordifolius (creeping burhead); Helanthium tenellum (dwarf burhead); Sagittaria brevirostra (midwestern arrowhead); Sagittaria calycina (Mississippi arrowhead); Sagittaria graminea (arrowhead); Sagittaria latifolia (duck potato, common arrowhead, wapato); Sagittaria platyphylla (arrowhead)
Amaranthaceae: Achyranthes japonica (Japanese chaff flower); Amaranthus albus (tumbleweed); Amaranthus hybridus (green amaranth, slender pigweed); Amaranthus spinosus (spiny pigweed, thorny amaranth, careless weed); Froelichia floridana (field snake-cotton, field cottonweed); Froelichia gracilis (slender snake-cotton, slender cottonweed); Iresine rhizomatosa (bloodleaf)
Anacardiaceae: Rhus aromatica (fragrant sumac, aromatic sumac, polecat bush); Rhus copallinum (winged sumac, shining sumac,dwarf sumac); Rhus glabra (smooth sumac); Rhus typhina (staghorn sumac); Toxicodendron pubescens (eastern poison oak); Toxicodendron radicans (poison ivy)
Annonaceae: Asimina triloba (pawpaw)
Apiaceae: Aegopodium podagraria (bishop's goutweed); Anethum graveolens (dill); Angelica venenosa (wood angelica, hairy angelica); Chaerophyllum procumbens (wild chervil); Chaerophyllum tainturieri (wild chervil); Cicuta maculata (common water hemlock, spotted cowbane); Conium maculatum (poison hemlock); Coriandrum sativum (coriander); Cryptotaenia canadensis (honewort, wild chervil); Cynosciadium digitatum (finger dogshade); Daucus carota (Queen Anne's lace,wild carrot); Erigenia bulbosa (harbinger of spring, pepper and salt); Eryngium leavenworthii (Leavenworth eryngo); Eryngium prostratum (spreading eryngo); Eryngium yuccifolium (rattlesnake master, button snakeroot); Heracleum sphondylium (cow parsnip, masterwort); Ligusticum canadense (lovage, angelico, nondo); Limnosciadium pinnatum (tansy dogshade); Lomatium foeniculaceum (hairy parsley, wild parsley); Osmorhiza claytonii (sweet cicely, woolly sweet cicely); Osmorhiza longistylis (anise root, sweet anise, smooth sweet cicely); Oxypolis rigidior (cowbane); Pastinaca sativa (parsnip, wild parsnip); Perideridia americana (eastern yampah); Polytaenia nuttallii (prairie parsley); Ptilimnium capillaceum (Atlantic mock bishop's weed); Ptilimnium costatum (big mock bishop's weed); Ptilimnium nuttallii (Ozark mock bishop's weed); Sanicula canadensis (black snakeroot, sanicle, Canada snakeroot); Sanicula odorata (black snakeroot, cluster-sanicle); Sanicula smallii (black snakeroot, southern sanicle); Sium suave (water parsley, water parsnip); Spermolepis echinata (hooked scale-seed); Spermolepis inermis (western scale-seed); Taenidia integerrima (yellow pimpernel); Thaspium barbinode (meadow parsnip); Thaspium chapmanii (hairy-joint meadow parsnip); Torilis arvensis (field hedge-parsley, hemlock chervil); Trepocarpus aethusae (whitenymph); Zizia aurea (common golden Alexanders, common meadow parsnip)
Apocynaceae: Amsonia ciliata (ciliate blue star); Amsonia illustris (shining blue star); Amsonia tabernaemontana (blue star, willow amsonia); Apocynum androsaemifolium (spreading dogbane, pink-flowered dogbane); Apocynum cannabinum (prairie dogbane, Indian hemp); Trachelospermum difforme (climbing dogbane); Vinca major (greater periwinkle); Vinca minor (common periwinkle, myrtle)
Aquifoliaceae: Ilex decidua (possum haw, deciduous holly)
Araceae: Arisaema dracontium (green dragon, dragon root); Arisaema triphyllum (Jack-in-the-pulpit, Indian turnip)
Araliaceae: Aralia nudicaulis (wild sarsaparilla); Aralia racemosa (American spikenard); Aralia spinosa (devil's walking stick, Hercules' club, tear-blanket); Panax quinquefolius (American ginseng, ginseng)
Aristolochiaceae: Asarum canadense (wild ginger); Endodeca serpentaria (Virginia snakeroot); Isotrema tomentosum (woolly pipevine, Dutchman's pipe)
Asclepiadaceae: Asclepias amplexicaulis (sand milkweed, bluntleaf milkweed); Asclepias exaltata (poke milkweed); Asclepias hirtella (prairie milkweed, tall green milkweed); Asclepias incarnata (swamp milkweed); Asclepias meadii (Mead's milkweed); Asclepias perennis (white milkweed, smoothseed milkweed); Asclepias purpurascens (purple milkweed); Asclepias quadrifolia (whorled milkweed, fourleaf milkweed); Asclepias speciosa (showy milkweed); Asclepias stenophylla (narrow-leaved milkweed); Asclepias subverticillata (poison milkweed); Asclepias sullivantii (smooth milkweed, prairie milkweed); Asclepias syriaca (common milkweed); Asclepias tuberosa (butterfly weed, chigger flower, pleurisy root); Asclepias variegata (variegated milkweed); Asclepias verticillata (whorled milkweed, horsetail milkweed); Asclepias viridiflora (green milkweed); Asclepias viridis (spider milkweed, green-flowered milkweed, Ozark milkweed); Cynanchum laeve (climbing milkweed, sand vine, blue vine); Gonolobus suberosus (angle-pod); Matelea baldwyniana (climbing milkweed); Matelea decipiens (climbing milkweed)
Asparagaceae: Hyacinthus orientalis (garden hyacinth)
Asphodelaceae: Kniphofia uvaria (redhot poker)
Aspleniaceae: Asplenium platyneuron (ebony spleenwort); Asplenium rhizophyllum (walking fern); Asplenium ruta-muraria (wall-rue)
Asteraceae/Anthemideae: Achillea millefolium (yarrow, common milfoil, nosebleed); Anthemis arvensis (corn chamomile); Anthemis cotula (Mayweed, dog fennel, stinking chamomile); Artemisia annua (sweet wormwood, annual wormwood, sweet sagewort); Artemisia campestris (western sagewort, wild wormwood); Cota tinctoria ssp. subtinctoria (yellow chamomile, golden marguerite); Leucanthemum vulgare (ox-eye daisy, white daisy); Matricaria chamomilla (wild chamomile, false chamomile, German chamomile); Matricaria discoidea (pineapple weed); Tanacetum vulgare (common tansy, golden buttons)
Asteraceae/Astereae: Amphiachyris dracunculoides (broom snakeroot, broomweed); Boltonia asteroides (false aster, false starwort); Boltonia decurrens (decurrent false aster); Boltonia diffusa (doll's daisy); Bradburia pilosa (soft goldenaster); Chaetopappa asteroides (Arkansas leastdaisy, tiny lazy daisy); Conyza canadensis (horseweed, Canada fleabane, hog weed); Conyza ramosissima (dwarf fleabane, spreading fleabane); Erigeron annuus (daisy fleabane, whitetop fleabane, annual fleabane); Erigeron philadelphicus (Philadelphia fleabane); Erigeron pulchellus (robin's plantain); Erigeron strigosus (daisy fleabane, whitetop fleabane); Eurybia hemispherica (single-stemmed bog aster, southern prairie aster); Euthamia graminifolia (common flat-topped goldenrod); Euthamia leptocephala (Mississippi Valley flat-topped goldenrod); Grindelia lanceolata (spiny-toothed gumweed); Grindelia squarrosa (curlytop gumweed); Heterotheca camporum var. camporum (golden aster, camphor weed); Heterotheca camporum var. glandulissima (golden aster, camphor weed); Heterotheca subaxillaris (camphor weed, telegraph plant); Ionactis linariifolia (stiff aster, stiff-leaved aster, flax-leaved aster); Solidago altissima (tall goldenrod); Solidago buckleyi (goldenrod); Solidago caesia (blue-stemmed goldenrod, wreath goldenrod); Solidago drummondii (Ozark goldenrod); Solidago flexicaulis (broadleaf goldenrod); Solidago gattingeri (goldenrod); Solidago gigantea (late goldenrod, tall goldenrod); Solidago juncea (early goldenrod); Solidago nemoralis (old-field goldenrod, gray goldenrod); Solidago petiolaris (downy goldenrod); Solidago ptarmicoides (white upland aster, sneezewort aster); Solidago radula (rough goldenrod); Solidago riddellii (goldenrod); Solidago rigida (stiff goldenrod, rigid goldenrod); Solidago rugosa (rough-leaved goldenrod, rough-stemmed goldenrod); Solidago speciosa (prairie goldenrod, showy goldenrod); Solidago ulmifolia var. ulmifolia (elm-leaved goldenrod); Symphyotrichum anomalum (aster); Symphyotrichum cordifolium (blue wood aster); Symphyotrichum drummondii (Drummond aster); Symphyotrichum laeve (smooth aster); Symphyotrichum lanceolatum (tall white aster, panicled aster); Symphyotrichum novae-angliae (New England aster); Symphyotrichum oblongifolium (aromatic aster, oblong-leaved aster); Symphyotrichum ontarionis (Ontario aster); Symphyotrichum oolentangiense (azure aster, blue devil); Symphyotrichum patens (spreading aster, purple daisy); Symphyotrichum pilosum (white heath aster); Symphyotrichum praealtum (willow-leaved aster); Symphyotrichum puniceum (glossy-leaved aster); Symphyotrichum racemosum (small white aster, frost flower); Symphyotrichum sericeum (silky aster); Symphyotrichum subulatum (inland saltmarsh aster, freeway aster); Symphyotrichum turbinellum (prairie aster)
Asteraceae/Cardueae: Arctium minus (common burdock); Carduus nutans (musk thistle, nodding thistle); Centaurea cyanus (cornflower, bachelor's button, blue bottle); Centaurea stoebe (spotted knapweed); Cirsium altissimum (tall thistle, roadside thistle); Cirsium arvense (Canada thistle, field thistle); Cirsium carolinianum (Carolina thistle, small-headed thistle); Cirsium discolor (field thistle); Cirsium muticum (swamp thistle); Cirsium vulgare (bull thistle); Echinops sphaerocephalus (great globethistle)
Asteraceae/Cichorieae: Chondrilla juncea (rush skeletonweed); Cichorium intybus (common chicory, blue sailors); Crepis pulchra (small-flowered hawksbeard); Hieracium aurantiacum (devil's paintbrush,orange hawkweed); Hieracium caespitosum (yellow king-devil); Hieracium gronovii (beaked hawkweed); Hieracium longipilum (long-haired hawkweed); Hypochaeris radicata (spotted cat's ear); Krigia biflora (two-flowered Cynthia, orange dwarf dandelion); Krigia cespitosa (common dwarf dandelion); Krigia dandelion (potato dandelion); Krigia virginica (Virginia dwarf dandelion); Lactuca canadensis (wild lettuce); Lactuca floridana (Florida lettuce, woodland lettuce); Lactuca hirsuta (downy lettuce, hairy lettuce); Lactuca saligna (willow-leaved lettuce); Lactuca serriola (prickly lettuce); Lapsana communis (nipplewort); Lygodesmia juncea (skeleton plant); Nabalus altissimus (tall white lettuce, rattlesnake root); Nabalus asper (rough white lettuce, rattlesnake root); Nabalus crepidineus (great white lettuce, rattlesnake root); Nothocalais cuspidata (prairie dandelion); Pyrrhopappus carolinianus (false dandelion); Sonchus arvensis (field sow thistle, perennial sow thistle); Sonchus asper (prickly sow thistle, spiny-leaved sow thistle); Taraxacum erythrospermum (red-seeded dandelion); Taraxacum officinale (common dandelion); Tragopogon dubius (yellow salsify, western salsify)
Asteraceae/Eupatorieae: Ageratina altissima (white snakeroot); Brickellia eupatorioides (false boneset); Brickellia grandiflora (tassel flower); Conoclinium coelestinum (mist-flower, blue boneset, wild ageratum); Eupatorium altissimum (tall thoroughwort); Eupatorium hyssopifolium (hyssop-leaved thoroughwort); Eupatorium perfoliatum (boneset, thoroughwort); Eupatorium semiserratum (thoroughwort); Eupatorium serotinum (late boneset); Eupatorium sessilifolium (upland boneset); Eupatorium xtruncatum (hybrid boneset); Eutrochium fistulosum (hollow-stemmed Joe-pye weed); Eutrochium maculatum (spotted Joe-pye weed); Eutrochium purpureum (green-stemmed Joe-pye weed); Fleischmannia incarnata (pink thoroughwort); Liatris aspera (rough gayfeather); Liatris cylindracea (blazing star); Liatris mucronata (narrow-leaved gayfeather); Liatris punctata (prairie snakeroot); Liatris pycnostachya (gayfeather, button snakeroot); Liatris scariosa (blazing star, gayfeather); Liatris spicata (button snakeroot); Liatris squarrosa (blazing star, gayfeather); Liatris squarrulosa (blazing star, gayfeather); Mikania scandens (climbing hempweed)
Asteraceae/Gnaphalieae: Anaphalis margaritacea (pearly everlasting); Antennaria neglecta (field pussytoes); Antennaria parlinii (plainleaf pussytoes, ladies' tobacco, Indian tobacco); Gamochaeta purpurea (purple cudweed, early cudweed); Pseudognaphalium obtusifolium (sweet everlasting, fragrant cudweed, old-field balsam, catfoot)
Asteraceae/Heliantheae: Acmella repens (oppositeleaf spotflower); Ambrosia artemisiifolia (common ragweed, bitter weed, Roman wormwood, hogweed); Ambrosia bidentata (lanceleaf ragweed, southern ragweed); Ambrosia psilostachya (western ragweed); Ambrosia trifida (giant ragweed, horse weed, great ragweed, buffalo weed); Berlandiera texana (Texas green eyes); Bidens aristosa (tickseed sunflower); Bidens bipinnata (Spanish needles); Bidens cernua (nodding bur marigold, sticktight); Bidens discoidea (few-bracted bur marigold); Bidens frondosa (beggar ticks, sticktight); Bidens tripartita (beggar ticks, swamp beggar ticks); Bidens vulgata (beggar ticks, sticktight); Coreopsis grandiflora (bigflower coreopsis); Coreopsis lanceolata (tickseed coreopsis); Coreopsis palmata (finger coreopsis); Coreopsis pubescens (star tickseed); Coreopsis tinctoria (plains coreopsis, calliopsis); Coreopsis tripteris (tall tickseed, tall coreopsis); Cosmos bipinnatus (garden cosmos, Mexican aster); Cosmos sulphureus (sulphur cosmos); Dyssodia papposa (fetid marigold); Echinacea pallida (pale purple coneflower); Echinacea paradoxa (yellow coneflower); Echinacea purpurea (purple coneflower); Echinacea simulata (glade coneflower, pale purple coneflower); Eclipta prostrata (yerba de tajo); Gaillardia aestivalis (prairie gaillardia, prairie blanket flower); Gaillardia pulchella (Indian blanket, fire-wheels); Galinsoga quadriradiata (fringed quickweed); Helenium amarum (bitterweed, bitter sneezeweed, yellow dog-fennel); Helenium autumnale (common sneezeweed, autumn sneezeweed); Helenium flexuosum (southern sneezeweed, purple-headed sneezeweed); Helianthus angustifolius (narrow-leaved sunflower); Helianthus annuus (common sunflower); Helianthus divaricatus (woodland sunflower); Helianthus grosseserratus (sawtooth sunflower); Helianthus hirsutus (hairy sunflower, bristly sunflower); Helianthus maximiliani (Maximilian sunflower); Helianthus microcephalus (small woodland sunflower); Helianthus mollis (ashy sunflower); Helianthus occidentalis (naked-stemmed sunflower); Helianthus pauciflorus (stiff sunflower, prairie sunflower); Helianthus petiolaris (prairie sunflower, Kansas sunflower, plains sunflower); Helianthus salicifolius (willow-leaved sunflower); Helianthus silphioides (rosinweed sunflower); Helianthus strumosus (pale-leaved sunflower); Helianthus tuberosus (Jerusalem artichoke); Heliopsis helianthoides (ox-eye, false sunflower, sunflower heliopsis); Hymenopappus scabiosaeus (old plainsman); Iva annua (marsh elder, sump weed); Palafoxia callosa (Spanish needles); Parthenium hispidum (wild quinine, American feverfew); Parthenium integrifolium (wild quinine, American feverfew); Polymnia canadensis (pale-flowered leaf cup); Ratibida columnifera (longhead prairie coneflower, Mexican hat); Ratibida pinnata (grayhead prairie coneflower, drooping coneflower); Rudbeckia amplexicaulis (clasping coneflower); Rudbeckia fulgida (orange coneflower); Rudbeckia hirta (black-eyed Susan); Rudbeckia laciniata (wild goldenglow, cutleaf coneflower); Rudbeckia missouriensis (Missouri coneflower); Rudbeckia subtomentosa (sweet coneflower); Rudbeckia triloba (brown-eyed Susan); Silphium asteriscus (starry rosinweed); Silphium integrifolium (rosinweed); Silphium laciniatum (compass plant); Silphium perfoliatum (cup plant, cup rosinweed); Silphium terebinthinaceum (prairie dock); Smallanthus uvedalia (bearsfoot, yellow-flowered leaf cup); Thelesperma megapotamicum (Colorado greenthread, Navajo tea, Hopi tea); Verbesina alternifolia (yellow ironweed); Verbesina helianthoides (yellow crownbeard); Verbesina virginica (white crownbeard, frost weed, tickweed); Xanthium strumarium (common cocklebur)
Asteraceae/Plucheeae: Pluchea camphorata (stinkweed, camphor weed, inland marsh fleabane)
Asteraceae/Senecioneae: Arnoglossum atriplicifolium (pale Indian plantain); Arnoglossum plantagineum (Indian plantain); Arnoglossum reniforme (great Indian plantain); Erechtites hieraciifolius (fireweed); Hasteola suaveolens (false Indian plantain); Packera aurea (golden ragwort, squaw weed); Packera glabella (butterweed); Packera obovata (squaw weed, roundleaf groundsel); Packera plattensis (prairie ragwort); Senecio vulgaris (common groundsel)
Asteraceae/Vernonieae: Elephantopus carolinianus (Carolina elephant's foot); Vernonia arkansana (curlytop ironweed, Arkansas ironweed); Vernonia baldwinii (western ironweed); Vernonia gigantea (tall ironweed); Vernonia missurica (Missouri ironweed)
Balsaminaceae: Impatiens balsamina (balsam, garden balsam); Impatiens capensis (jewelweed, spotted touch-me-not); Impatiens pallida (jewelweed, pale touch-me-not)
Berberidaceae: Berberis thunbergii (Japanese barberry); Caulophyllum thalictroides (blue cohosh); Mahonia aquifolium (hollyleaved barberry); Podophyllum peltatum (May apple, mandrake)
Betulaceae: Alnus serrulata (common alder, smooth alder, tag alder); Betula nigra (river birch, red birch)
Bignoniaceae: Bignonia capreolata (cross vine, quarter vine); Campsis radicans (trumpet creeper, trumpet vine, devil's shoelaces, shoestrings, hell vine); Catalpa bignonioides (southern catalpa, common catalpa); Catalpa speciosa (northern catalpa, catawba tree, cigar tree, hardy catalpa, Indian bean)
Boraginaceae: Anchusa officinalis (common bugloss); Buglossoides arvensis (corn gromwell, bastard alkanet); Cynoglossum officinale (common hound's tongue); Cynoglossum virginianum (wild comfrey, giant forget-me-not); Echium vulgare (blueweed, blue devil, blue thistle); Hackelia virginiana (beggar's lice, stickseed); Lithospermum canescens (hoary puccoon, orange puccoon); Lithospermum caroliniense (Plains puccoon); Lithospermum incisum (yellow puccoon, narrow-leaved puccoon, Plains stoneseed); Lithospermum latifolium (American gromwell); Mertensia virginica (bluebells, Virginia cowslip); Myosotis macrosperma (big-seeded scorpiongrass); Myosotis scorpioides (forget-me-not, water scorpion grass); Myosotis verna (early scorpiongrass); Onosmodium molle (western false gromwell)
Brassicaceae: Alliaria petiolata (garlic mustard); Arabidopsis lyrata (sand cress); Arabidopsis thaliana (mouse-ear cress, thale cress); Barbarea vulgaris (yellow rocket, common winter cress); Berteroa incana (hoary alyssum); Boechera canadensis (sicklepod); Boechera dentata (rock cress); Boechera laevigata (smooth rock cress); Boechera missouriensis (Missouri rock cress, rock cress); Brassica napus (rutabaga, rape, rapeseed, Swedish turnip); Brassica nigra (black mustard); Camelina microcarpa (littlepod false flax, flaxweed, gold-of-pleasure, Dutch flax); Capsella bursa-pastoris (shepherd's purse); Cardamine bulbosa (springcress); Cardamine concatenata (cut leaved toothwort); Cardamine douglassii (purple cress, northern bitter cress); Cardamine hirsuta (hoary bitter cress); Cardamine parviflora (small-flowered bitter cress); Cardamine pensylvanica (bitter cress, Pennsylvania bittercress); Chorispora tenella (blue mustard); Descurainia pinnata (tansy mustard); Descurainia sophia (flixweed, tansy mustard); Draba aprica (whitlow grass, whitlow wort); Draba brachycarpa (whitlow grass, shortpod draba); Draba cuneifolia (whitlow grass, wedgeleaf draba); Draba reptans (white whitlow wort); Draba verna (vernal whitlow grass); Erucastrum gallicum (dog mustard, rocketweed); Erysimum capitatum (western wallflower); Erysimum repandum (bushy wallflower, treacle mustard); Hesperis matronalis (dame's rocket); Iodanthus pinnatifidus (purple rocket, violet rocket); Leavenworthia uniflora (Michaux's gladecress, leavenworthia); Lepidium campestre (field cress, cow cress, field pepper grass); Lepidium chalepense (lens-podded hoary cress); Lepidium didymum (wart cress, swine cress); Lepidium draba (heart-podded hoary cress, heart-podded white top); Lepidium latifolium (perennial pepper grass, broad-leaved pepper grass); Lepidium oblongum (stinking pepperweed); Lepidium perfoliatum (shield cress, perfoliate pepper grass); Lepidium virginicum (poor man's pepper grass, pepper grass, Virginia pepper grass); Microthlaspi perfoliatum (penny cress, perfoliate penny cress); Nasturtium officinale (watercress); Physaria filiformis (Missouri bladderpod); Planodes virginicum (Virginia rock cress); Raphanus raphanistrum (wild radish, jointed charlock); Raphanus sativus (radish, garden radish); Rorippa aquatica (lake cress); Rorippa palustris (marsh yellow cress, bog yellow cress, yellow water cress); Rorippa sessiliflora (sessile-flowered cress, marsh cress, yellow cress); Rorippa sinuata (spreading yellow cress); Rorippa sylvestris (creeping yellow cress); Selenia aurea (selenia, golden selenia); Sisymbrium altissimum (tumble mustard, Jim Hill mustard); Sisymbrium loeselii (tall hedge mustard); Sisymbrium officinale (hedge mustard); Thlaspi alliaceum (roadside pennycress); Thlaspi arvense (field penny cress, stinkweed); Turritis glabra (tower mustard)
Cabombaceae: Brasenia schreberi (water shield, snot plant); Cabomba caroliniana (Carolina water shield, fanwort)
Cactaceae: Opuntia cespitosa (eastern prickly pear)
Calycanthaceae: Calycanthus floridus (Carolina allspice, sweetshrub)
Campanulaceae: Campanula americana (tall bellflower, American bellflower); Campanula aparinoides (marsh bellflower); Campanula rapunculoides (creeping bellflower, rover bellflower, false rampion); Campanula rotundifolia (harebell, bluebell); Lobelia cardinalis (cardinal flower); Lobelia inflata (Indian tobacco, inflated lobelia); Lobelia puberula (purple dewdrop, big blue lobelia, blue cardinal flower); Lobelia siphilitica (great blue lobelia, blue cardinal flower, blue lobelia); Lobelia spicata (spiked lobelia, palespike lobelia); Triodanis biflora (small Venus' looking-glass); Triodanis leptocarpa (slender-leaved Venus' looking glass, prairie Venus' looking glass); Triodanis perfoliata (clasping Venus' looking glass)
Cannabaceae: Humulus japonicus (Japanese hops); Humulus lupulus (common hops)
Caprifoliaceae: Cephalaria transsylvanica (pincushion flower); Lonicera dioica (limber honeysuckle, wild honeysuckle, red honeysuckle); Lonicera flava (yellow honeysuckle); Lonicera fragrantissima (winter honeysuckle, wild honeysuckle); Lonicera japonica (Japanese honeysuckle); Lonicera maackii (Amur honeysuckle, bush honeysuckle); Lonicera sempervirens (trumpet honeysuckle, coral honeysuckle); Sambucus canadensis (common elderberry); Symphoricarpos occidentalis (wolfberry, western snowberry); Symphoricarpos orbiculatus (coral berry, Indian currant, buckbrush); Triosteum angustifolium (yellow-flowered horse gentian); Triosteum aurantiacum (red-fruited horse gentian); Triosteum perfoliatum (common horse gentian, wild coffee, tinker's weed, feverwort); Viburnum carlesii (Korean spice viburnum); Viburnum dentatum (southern arrowwood); Viburnum opulus (Guelder rose); Viburnum plicatum (Japanese snowball); Viburnum prunifolium (blackhaw); Viburnum rhytidophyllum (leatherleaf arrowwood); Viburnum rufidulum (southern blackhaw, wild raisin)
Caryophyllaceae: Agrostemma githago (corn cockle); Arenaria serpyllifolia (thyme-leaved sandwort); Cerastium brachypetalum (gray mouse-ear chickweed); Cerastium dubium (doubtful chickweed, three-styled chickweed); Cerastium fontanum (common mouse-eared chickweed); Cerastium glomeratum (clammy chickweed); Cerastium nutans (nodding chickweed, powderhorn); Cerastium pumilum (Curtis' mouse-ear chickweed); Cerastium semidecandrum (small or five-stamen mouse-ear chickweed); Cerastium velutinum (field chickweed, prairie chickweed); Dianthus armeria (Deptford pink); Dianthus barbatus (sweet William); Geocarpon minimum (geocarpon, Tiny tim, earth-flesh); Gypsophila elegans (showy baby's breath); Holosteum umbellatum (jagged chickweed); Lychnis coronaria (mullein-pink, rose-campion); Mononeuria patula (sandwort, Pitcher's stitchwort); Paronychia fastigiata (hairy nailwort, forked chickweed); Sabulina michauxii (rock sandwort, Michaux's stitchwort); Sagina decumbens (trailing pearlwort); Saponaria officinalis (bouncing-bet, soapwort); Scleranthus annuus (knawel, annual knawel); Silene antirrhina (sleepy catchfly); Silene caroliniana (Wherry's pink, wild pink); Silene csereii (smooth catchfly, glaucous campion); Silene latifolia (white campion, evening campion, white cockle); Silene regia (royal catchfly); Silene stellata (starry campion); Silene virginica (fire pink); Silene vulgaris (bladder campion, bladder catchfly); Spergula arvensis (corn spurrey); Stellaria media (common chickweed); Stellaria pubera (star chickweed)
Celastraceae: Celastrus orbiculatus (Oriental bittersweet); Celastrus scandens (American bittersweet); Euonymus alatus (burning bush, winged euonymus); Euonymus americanus (strawberry bush, brook euonymus); Euonymus atropurpureus (wahoo, spindle tree); Euonymus fortunei (wintercreeper)
Chenopodiaceae: Chenopodium album (pigweed, lamb's quarters); Chenopodium ambrosioides (Mexican tea, wormseed); Chenopodium pumilio (clammy goosefoot); Chenopodium simplex (maple-leaved goosefoot); Cycloloma atriplicifolium (winged pigweed, tumble ringwing)
Cistaceae: Lechea mucronata (hairy pinweed)
Cleomaceae: Cleome hassleriana (spider flower, pink queen); Cleome serrulata (Rocky Mountain bee plant, stinking clover); Polanisia dodecandra (clammy-weed)
Commelinaceae: Commelina communis (common dayflower); Commelina diffusa (dayflower); Commelina erecta (dayflower); Commelina virginica (dayflower); Tradescantia ernestiana (spiderwort); Tradescantia longipes (wild crocus, dwarf spiderwort); Tradescantia ohiensis (smooth spiderwort); Tradescantia ozarkana (Ozark spiderwort); Tradescantia subaspera (wide-leaved spiderwort); Tradescantia virginiana (Virginia spiderwort, widow's tears)
Convolvulaceae: Calystegia sepium (hedge bindweed, wild morning glory, Rutland beauty); Calystegia silvatica (hedge bindweed); Convolvulus arvensis (field bindweed, small bindweed); Cuscuta (dodder); Dichondra carolinensis (pony-foot); Evolvulus nuttallianus (evolvulus); Ipomoea coccinea (red morning glory, scarlet starglory); Ipomoea hederacea (blue morning glory, ivy-leaved morning glory); Ipomoea lacunosa (small white morning glory); Ipomoea pandurata (wild potato vine, man-of-the-earth, bigroot morning glory); Ipomoea purpurea (common morning glory); Ipomoea quamoclit (cypress vine); Ipomoea xleucantha (small pink morning glory); Jacquemontia tamnifolia (tie vine, smallflower morning glory); Stylisma pickeringii (stylisma)
Cornaceae: Cornus amomum (swamp dogwood, pale dogwood); Cornus drummondii (rough-leaved dogwood); Cornus florida (flowering dogwood); Cornus foemina (gray dogwood, stiff dogwood)
Crassulaceae: Sedum erythrostictum (live-forever); Sedum nuttallianum (Nuttall's sedum); Sedum pulchellum (widow's cross); Sedum sarmentosum (yellow stonecrop); Sedum ternatum (three-leaved stonecrop)
Cucurbitaceae: Citrullus lanatus (watermelon); Cucurbita foetidissima (buffalo gourd, Missouri gourd, wild pumpkin); Cucurbita pepo (yellow-flowered gourd, wild pear gourd); Echinocystis lobata (wild cucumber vine, balsam apple); Melothria pendula (creeping cucumber); Sicyos angulatus (bur cucumber)
Cyperaceae: Bulbostylis capillaris (densetuft hairsedge); Carex albursina (white bear sedge); Carex annectens (yellow-fruited sedge); Carex blanda (common wood sedge); Carex bushii (Bush's sedge); Carex buxbaumii (brown bog sedge); Carex cherokeensis (wolftail, Cherokee sedge); Carex conjuncta (soft fox sedge); Carex crawei (Crawe's sedge); Carex crinita (fringed sedge); Carex cristatella (crested sedge); Carex crus-corvi (raven's foot sedge); Carex davisii (Davis' sedge); Carex eburnea (bristle-leaved sedge); Carex frankii (Frank's sedge); Carex glaucodea (blue sedge); Carex granularis (meadow sedge, limestone meadow sedge); Carex grayi (globe sedge, bur sedge); Carex grisea (gray sedge); Carex hirsutella (fuzzy wuzzy sedge); Carex hyalinolepis (shoreline sedge); Carex jamesii (grass sedge); Carex lupulina (hop sedge); Carex lurida (sallow sedge); Carex meadii (Mead's sedge); Carex molesta (troublesome sedge); Carex planispicata (flat-spiked sedge); Carex rosea (stellate sedge); Carex shortiana (Short's sedge); Carex squarrosa (squarrose sedge); Carex tribuloides (blunt broom sedge); Carex typhina (cat-tail sedge); Cyperus acuminatus (umbrella sedge); Cyperus echinatus (hedgehog club rush, globe flatsedge); Cyperus esculentus (yellow nutgrass); Cyperus grayoides (Illinois flatsedge); Cyperus lupulinus (nut sedge); Cyperus plukenetii (Plukenet's umbrella sedge); Cyperus pseudovegetus (umbrella sedge); Cyperus retrofractus (rough flatsedge); Cyperus squarrosus (umbrella sedge); Eleocharis quadrangulata (spike rush); Fimbristylis autumnalis (slender fimbry); Fuirena simplex (umbrella grass); Rhynchospora globularis (beaked rush); Schoenoplectus pungens (chairmaker's rush, common three-square); Scirpus atrovirens (common bulrush); Scirpus pendulus (rufous bulrush); Scleria ciliata (hairy nut grass, nut rush); Scleria triglomerata (tall nut grass, whipgrass)
Dennstaedtiaceae: Pteridium aquilinum (bracken)
Dioscoreaceae: Dioscorea quaternata (wild yam); Dioscorea villosa (wild yam)
Dipsacaceae: Dipsacus fullonum (common teasel, wild teasel); Dipsacus laciniatus (cut-leaved teasel)
Dryopteridaceae: Cystopteris protrusa (lowland brittle fern, southern fragile fern); Polystichum acrostichoides (Christmas fern)
Ebenaceae: Diospyros virginiana (persimmon, possumwood)
Elaeagnaceae: Elaeagnus umbellata (autumn olive)
Equisetaceae: Equisetum hyemale (common scouring rush, winter scouring rush)
Ericaceae: Lyonia mariana (staggerbush); Monotropa hypopitys (pinesap, false beech drops); Monotropa uniflora (Indian pipe, ghost flower); Rhododendron prinophyllum (wild honeysuckle, roseshell azalea, mountain azalea, election pink); Vaccinium arboreum (farkleberry, sparkleberry); Vaccinium pallidum (lowbush blueberry, hillside blueberry); Vaccinium stamineum (deerberry, highbush huckleberry, southern gooseberry, squaw huckleberry)
Euphorbiaceae: Acalypha deamii (two-seeded mercury, large-seeded mercury); Acalypha gracilens (slender three-seeded mercury); Acalypha monococca (one-seeded mercury); Acalypha ostryifolia (roughpod copperleaf); Acalypha rhomboidea (rhombic copperleaf, three-seeded mercury); Acalypha virginica (Virginia copperleaf); Andrachne phyllanthoides (maidenbush, buckbrush); Croton capitatus (woolly croton, hogwort); Croton glandulosus (sand croton, tropic croton); Croton michauxii (slender rushfoil); Croton monanthogynus (one-seeded croton, prairie tea); Croton willdenowii (common rushfoil); Euphorbia commutata (wood spurge); Euphorbia corollata (flowering spurge); Euphorbia cyathophora (painted leaf, fire-on-the-mountain); Euphorbia cyparissias (cypress spurge, graveyard spurge); Euphorbia davidii (spurge); Euphorbia dentata (toothed spurge); Euphorbia geyeri (Geyer's spurge); Euphorbia humistrata (spurge); Euphorbia maculata (milk purslane, prostrate spurge); Euphorbia marginata (snow-on-the-mountain); Euphorbia nutans (nodding spurge, eyebane); Euphorbia obtusata (blunt-leaved spurge); Euphorbia prostrata (groundfig spurge, milk spurge); Euphorbia serpens (round-leaved spurge); Euphorbia spathulata (spurge); Phyllanthus caroliniensis (Carolina leaf-flower); Ricinus communis (castor oil plant, castor bean); Tragia betonicifolia (noseburn); Tragia cordata (heart-leaved tragia); Tragia ramosa (noseburn)
Fabaceae/Caesalpinioideae: Cercis canadensis (eastern redbud, Judas tree); Chamaecrista fasciculata (showy partridge-pea); Chamaecrista nictitans (small-flowered partridge-pea, sensitive pea); Gleditsia aquatica (water locust); Gleditsia triacanthos (honey locust); Gymnocladus dioicus (Kentucky coffee tree); Senna marilandica (southern wild senna); Senna obtusifolia (sicklepod, coffee weed); Senna occidentalis (coffee senna, coffee weed)
Fabaceae/Faboideae: Acmispon americanus (prairie trefoil); Aeschynomene indica (Indian jointvetch); Aeschynomene rudis (rough jointvetch); Amorpha canescens (lead plant); Amorpha fruticosa (false indigo); Amphicarpaea bracteata (hog peanut); Apios americana (groundnut, American potato bean); Astragalus canadensis (rattleweed); Astragalus crassicarpus var. trichocalyx (ground plum); Astragalus distortus (Ozark milk vetch, bent milk vetch); Baptisia alba (white wild indigo); Baptisia australis (blue false indigo); Baptisia bracteata (cream white indigo, long-bracted wild indigo, plains wild indigo); Clitoria mariana (butterfly pea); Crotalaria sagittalis (rattlebox); Crotalaria spectabilis (showy rattlebox); Dalea candida (white prairie clover); Dalea gattingeri (Gattinger's prairie clover); Dalea leporina (foxtail dalea, hare's foot dalea); Dalea purpurea (purple prairie clover); Desmodium canadense (showy tick trefoil, Canada tick clover, giant tick clover); Desmodium canescens (hoary tick trefoil, hoary tick clover); Desmodium cuspidatum (largebract tick trefoil, longleaf tick clover); Desmodium laevigatum (smooth tick trefoil, smooth tick clover); Desmodium paniculatum (tall tick trefoil); Desmodium rotundifolium (dollarleaf, low tick trefoil, prostrate tick trefoil); Desmodium viridiflorum (velvetleaf tick trefoil); Galactia regularis (downy milk pea); Glycyrrhiza lepidota (wild licorice); Hylodesmum glutinosum (cluster tick trefoil, large-flowered tick clover, sticky tick clover); Hylodesmum nudiflorum (naked tick trefoil, naked-stemmed tick clover); Hylodesmum pauciflorum (fewflower tick trefoil, few-flowered tick clover); Kummerowia stipulacea (Korean clover, Korean lespedeza); Kummerowia striata (Japanese clover, Japanese lespedeza, common lespedeza); Lathyrus hirsutus (Caley pea, singletary pea); Lathyrus latifolius (everlasting pea, perennial sweet pea); Lathyrus palustris (vetchling, marsh pea); Lathyrus venosus (bushy vetchling); Lespedeza bicolor (shrubby lespedeza); Lespedeza capitata (round-headed bush clover, roundhead lespedeza); Lespedeza cuneata (sericea lespedeza, Chinese lespedeza); Lespedeza frutescens (prairie bush clover, prairie lespedeza); Lespedeza hirta (hairy bush clover, hairy lespedeza); Lespedeza procumbens (trailing bush clover, trailing lespedeza); Lespedeza repens (creeping bush clover, creeping lespedeza); Lespedeza violacea (violet bush clover, violet lespedeza); Lespedeza virginica (slender bush clover, slender lespedeza); Lotus corniculatus (bird's foot trefoil); Medicago lupulina (black medick); Medicago polymorpha (California bur clover, smooth bur clover); Medicago sativa (alfalfa); Melilotus albus (white sweet clover); Melilotus officinalis (yellow sweet clover, yellow melilot); Orbexilum onobrychis (French grass); Orbexilum pedunculatum (Sampson's snakeroot); Pediomelum esculentum (prairie turnip, Indian breadroot, wild potato); Pediomelum tenuiflorum (gray scurf pea); Phaseolus polystachios (wild bean); Pueraria montana (kudzu); Rhynchosia latifolia (snout bean); Robinia hispida (bristly locust, rose acacia); Robinia pseudoacacia (black locust); Securigera varia (crown vetch); Sesbania herbacea (coffee-weed, bequilla); Strophostyles helvola (wild bean, amberique bean); Strophostyles leiosperma (slickseed wild bean); Strophostyles umbellata (wild bean); Stylosanthes biflora (pencil flower); Tephrosia virginiana (goat's rue, hoary pea, catgut); Trifolium arvense (rabbit's foot clover); Trifolium campestre (large hop clover, Bishop clover); Trifolium hybridum (Alsike clover); Trifolium incarnatum (crimson clover); Trifolium pratense (red clover); Trifolium reflexum (buffalo clover); Trifolium repens (white clover, Ladino clover, Dutch clover); Trifolium resupinatum (Persian clover); Vicia caroliniana (wood vetch, pale vetch); Vicia grandiflora (bigflower vetch); Vicia sativa (narrow-leaved common vetch, spring vetch); Vicia tetrasperma (lentil vetch); Vicia villosa ssp. varia (woolly vetch, winter vetch); Vicia villosa ssp. villosa (woolly vetch, winter vetch); Wisteria frutescens (American wisteria); Wisteria sinensis (Chinese wisteria)
Fabaceae/Mimosoideae: Acaciella angustissima (prairie acacia); Albizia julibrissin (mimosa, silktree); Desmanthus illinoensis (Illinois bundle flower, prairie mimosa); Mimosa quadrivalvis (sensitive brier, catclaw sensitive brier, bashful brier)
Fagaceae: Fagus grandifolia (American beech); Quercus lyrata (overcup oak)
Fumariaceae: Corydalis aurea ssp. occidentalis (golden corydalis); Corydalis crystallina (mealy corydalis); Corydalis flavula (pale corydalis, yellow fumewort, yellow harlequin); Corydalis micrantha ssp. australis (small-flowered corydalis, slender fumewort); Corydalis micrantha ssp. micrantha (small-flowered corydalis, slender fumewort); Dicentra canadensis (squirrel corn); Dicentra cucullaria (Dutchman's breeches); Fumaria officinalis (fumitory, earthsmoke, fumewort)
Gentianaceae: Frasera caroliniensis (American columbo, green gentian); Gentiana andrewsii (closed gentian, bottle gentian); Gentiana puberulenta (prairie gentain, downy gentian); Gentianella quinquefolia (stiff gentian, ague-weed); Obolaria virginica (pennywort); Sabatia angularis (rose-pink, rose-gentian); Zeltnera texensis (Texas centaury)
Geraniaceae: Erodium cicutarium (filaree, alfilaria, pink needle, pin clover); Geranium carolinianum (Carolina crane's bill); Geranium dissectum (cutleaf crane's bill); Geranium maculatum (wild geranium, spotted crane's bill); Geranium molle (dovesfoot crane's bill); Geranium pusillum (small crane's bill)
Grossulariaceae: Ribes cynosbati (prickly gooseberry, dogberry); Ribes missouriense (Missouri gooseberry, wild gooseberry); Ribes odoratum (golden currant, buffalo currant, Missouri currant)
Haloragaceae: Myriophyllum heterophyllum (two-leaf water-milfoil, coontail)
Hamamelidaceae: Hamamelis vernalis (Ozark witch-hazel, vernal witch-hazel); Hamamelis virginiana (eastern witch-hazel, American witch-hazel)
Heliotropiaceae: Heliotropium indicum (Indian heliotrope, turnsole); Heliotropium tenellum (pasture heliotrope)
Hydrangeaceae: Hydrangea arborescens (American hydrangea, smooth hydrangea, sevenbark); Hydrangea quercifolia (oakleaf hydrangea); Philadelphus inodorus (scentless mock orange); Philadelphus pubescens (hoary mock orange)
Hydrocharitaceae: Limnobium spongia (American frogbit)
Hydroleaceae: Hydrolea uniflora (hydrolea)
Hydrophyllaceae: Ellisia nyctelea (Aunt Lucy, waterpod, nyctelea); Hydrophyllum appendiculatum (woollen breeches, notchbract waterleaf); Hydrophyllum canadense (broadleaf waterleaf); Hydrophyllum virginianum (waterleaf, Virginia waterleaf, John's cabbage); Phacelia bipinnatifida (forest phacelia); Phacelia covillei (Coville's phacelia); Phacelia gilioides (phacelia); Phacelia hirsuta (phacelia); Phacelia purshii (Miami mist); Phacelia ranunculacea (phacelia)
Hypericaceae: Hypericum adpressum (creeping St. John's wort); Hypericum ascyron ssp. pyramidatum (great St. John's-wort, giant St. John's-wort); Hypericum drummondii (nits and lice); Hypericum gentianoides (pineweed, orange grass); Hypericum hypericoides ssp. multicaule (St. Andrew's cross); Hypericum lobocarpum (St. John's-wort); Hypericum mutilum (dwarf St. John's-wort, small-flowered St. John's- wort); Hypericum perforatum (common St. John's-wort, Klamath weed); Hypericum prolificum (shrubby St. John's-wort); Hypericum punctatum (spotted St. John's-wort); Hypericum sphaerocarpum (round-fruited St. John's-wort)
Iridaceae: Belamcanda chinensis (blackberry lily); Iris brevicaulis (short-stemmed iris, lamance iris, zigzag iris); Iris cristata (crested iris, dwarf wild iris); Iris fulva (copper iris, red iris); Iris germanica (German iris, blue flag); Iris pseudacorus (yellow iris, yellow flag); Iris verna (dwarf iris); Iris virginica (southern blue flag); Nemastylis geminiflora (prairie iris); Sisyrinchium albidum (blue-eyed grass); Sisyrinchium angustifolium (blue-eyed grass); Sisyrinchium atlanticum (blue-eyed grass); Sisyrinchium campestre (prairie blue-eyed grass, white-eyed grass)
Iteaceae: Itea virginica (Virginia willow, sweet-spire, tassel-white)
Juglandaceae: Carya tomentosa (mockernut hickory, white hickory); Juglans nigra (black walnut, eastern black walnut)
Juncaceae: Juncus diffusissimus (slimpod rush); Juncus effusus (soft rush, bog rush); Juncus marginatus (grass-leaved rush); Juncus torreyi (rush); Luzula campestris (wood rush)
Lamiaceae: Agastache nepetoides (yellow giant hyssop); Agastache scrophulariifolia (purple giant hyssop, figwort giant hyssop); Ajuga reptans (carpet bugle); Blephilia ciliata (Ohio horse mint); Blephilia hirsuta (wood mint); Callicarpa americana (American beautyberry, beautyberry, French mulberry); Clinopodium arkansanum (Arkansas calamint, satureja, low calamint); Collinsonia canadensis (richweed, citronella, horse balm); Cunila origanoides (dittany); Galeopsis tetrahit (common hemp nettle); Glechoma hederacea (ground ivy, gill-over-the-ground); Hedeoma hispida (mock pennyroyal, rough false pennyroyal); Hedeoma pulegioides (pennyroyal, American false pennyroyal); Lamium amplexicaule (henbit); Lamium purpureum (dead nettle); Leonurus cardiaca (motherwort); Leonurus japonicus (honeyweed); Leonurus marrubiastrum (biennial motherwort, lion's tail, horehound motherwort); Lycopus americanus (American bugleweed); Lycopus virginicus (bugle weed, Virginia bugleweed); Mentha canadensis (corn mint); Mentha piperita (peppermint); Mentha spicata (spearmint); Monarda bradburiana (beebalm, Bradbury beebalm); Monarda citriodora (lemon mint); Monarda didyma (beebalm, Oswego tea); Monarda fistulosa (wild bergamot, horsemint); Monarda punctata (dotted beebalm, horsemint); Nepeta cataria (catnip, catmint); Ocimum basilicum (basil, sweet basil, lemon basil); Perilla frutescens (beefsteak plant, wild basil, summer coleus, rattlesnake weed); Perovskia atriplicifolia (Russian sage); Physostegia virginiana (false dragonhead, obedient plant, Virginia lionsheart); Prunella vulgaris (self-heal, heal-all); Pycnanthemum albescens (white mountain mint); Pycnanthemum muticum (mountain mint); Pycnanthemum pilosum (hairy mountain mint); Pycnanthemum tenuifolium (slender mountain mint); Pycnanthemum virginianum (mountain mint); Salvia azurea (blue sage); Salvia farinacea (mealycup sage); Salvia lyrata (lyre-leaved sage, cancerweed); Salvia reflexa (lance-leaved sage, Rocky Mountain sage); Scutellaria bushii (Bush's skullcap); Scutellaria elliptica (hairy skullcap); Scutellaria incana (downy skullcap, hoary skullcap); Scutellaria lateriflora (mad dog skullcap); Scutellaria ovata (heart-leaved skullcap, egg-leaved skullcap); Scutellaria parvula (small skullcap); Stachys byzantina (woolly hedgenettle); Stachys pilosa (woundwort, marsh betony); Stachys tenuifolia (thinleaf betony, slenderleaf betony); Teucrium canadense (wood sage, American germander); Trichostema brachiatum (false pennyroyal); Trichostema dichotomum (blue curls, bastard pennyroyal); Trichostema setaceum (blue curls)
Lauraceae: Lindera benzoin (spice bush); Sassafras albidum (sassafras)
Lentibulariaceae: Utricularia subulata (slender bladderwort, zigzag bladderwort); Utricularia vulgaris (common bladderwort, greater bladderwort)
Liliaceae: Allium canadense (wild garlic, wild onion); Allium cepa (onion); Allium sativum (garlic); Allium stellatum (wild onion, pink wild onion); Allium tricoccum (wild leek); Allium tuberosum (garlic chive); Allium vineale (field garlic); Amianthium muscitoxicum (fly poison); Asparagus officinalis (asparagus); Camassia angusta (wild hyacinth); Camassia scilloides (wild hyacinth); Convallaria majalis (lily of the valley); Erythronium albidum (white dogtooth violet, white trout lily, white fawn lily); Erythronium americanum (yellow adder's tongue, yellow dogtooth violet, yellow trout lily); Erythronium mesochoreum (prairie dogtooth violet, white dogtooth violet, white trout lily); Erythronium rostratum (yellow adder's tongue, yellow dogtooth violet, yellow trout lily); Galanthus nivalis (snowdrop); Hemerocallis fulva (orange day lily); Hyacinthoides non-scripta (English bluebell); Hymenocallis caroliniana (spider lily); Hypoxis hirsuta (yellow star grass); Leucojum aestivum (snowflake, summer snowflake); Lilium michiganense (Michigan lily, Turk's cap lily); Lilium philadelphicum (wood lily); Liriope muscari (lilyturf); Maianthemum racemosum (false Solomon's seal, false spikenard); Melanthium virginicum (bunchflower); Muscari botryoides (common grape hyacinth); Muscari racemosum (blue bottle, grape hyacinth, musk hyacinth); Narcissus poeticus (poet's narcissus, pheasant's eye); Narcissus pseudonarcissus (daffodil); Nothoscordum bivalve (false garlic, crow poison); Ornithogalum nutans (star of Bethlehem); Ornithogalum umbellatum (star of Bethlehem); Polygonatum biflorum (Solomon's Seal); Scilla siberica (squill, Siberian squill); Stenanthium gramineum (featherbells); Trillium flexipes (white trillium, white wake robin, drooping trillium); Trillium nivale (snow trillium, dwarf white trillium); Trillium recurvatum (purple trillium, bloody butcher, purple wake robin); Trillium sessile (wake robin, toadshade); Trillium viride (green trillium); Uvularia grandiflora (large bellwort, bellwort); Uvularia sessilifolia (small bellwort); Veratrum woodii (false hellebore); Zigadenus elegans (white camas)
Limnanthaceae: Floerkea proserpinacoides (false mermaid)
Linaceae: Linum medium (stiff yellow flax, sucker flax); Linum sulcatum (grooved yellow flax, ridged yellow flax); Linum usitatissimum (common flax)
Linderniaceae: Lindernia dubia (false pimpernel)
Loasaceae: Mentzelia albescens (stickleaf, wavyleaf blazing star); Mentzelia nuda (sand lily); Mentzelia oligosperma (stickleaf, chicken thief)
Loganiaceae: Mitreola petiolata (miterwort, lax hornpod); Spigelia marilandica (Indian pink, woodland pinkroot, wormgrass)
Lycopodiaceae: Lycopodium dendroideum (round-branched ground pine); Lycopodium digitatum (running ground cedar)
Lythraceae: Ammannia coccinea (toothcup); Cuphea viscosissima (clammy cuphea, blue waxweed); Decodon verticillatus (swamp loosestrife, water willow); Lythrum alatum (winged loosestrife); Lythrum salicaria (purple loosestrife, spiked loosestrife); Rotala ramosior (toothcup)
Magnoliaceae: Liriodendron tulipifera (tulip tree, yellow poplar); Magnolia macrophylla (bigleaf magnolia); Magnolia stellata (star magnolia)
Malvaceae: Abutilon theophrasti (velvet-leaf, butter-print); Alcea rosea (hollyhock); Anoda cristata (spurred anoda); Callirhoe alcaeoides (pink poppy mallow, pale poppy mallow, plains poppy mallow); Callirhoe bushii (Bush's poppy mallow); Callirhoe digitata (fringed poppy mallow, finger poppy mallow, finger wine cup); Callirhoe involucrata (purple poppy mallow); Gossypium hirsutum (upland cotton); Hibiscus laevis (rose mallow, halberd-leaved rose mallow); Hibiscus lasiocarpos (rose mallow, hairy rose mallow); Hibiscus syriacus (rose of Sharon); Hibiscus trionum (flower-of-an-hour, Venice mallow); Malva moschata (musk mallow); Malva neglecta (common mallow, cheeses); Malva pusilla (dwarf mallow); Sida elliottii (Elliott's sida); Sida spinosa (prickly sida); Tilia americana (American basswood)
Marantaceae: Thalia dealbata (thalia, powdery thalia)
Melastomataceae: Rhexia mariana (meadow beauty); Rhexia virginica (wing-stemmed meadow beauty ,handsome Harry)
Menispermaceae: Calycocarpum lyonii (cupseed); Cocculus carolinus (Carolina moonseed, Carolina snailseed, fishberry); Menispermum canadense (moonseed, yellow parilla)
Molluginaceae: Mollugo verticillata (carpetweed, Indian chickweed)
Moraceae: Fatoua villosa (mulberry weed)
Nelumbonaceae: Nelumbo lutea (American lotus, yanquapin, water chinquapin, lotus lily)
Nyctaginaceae: Mirabilis albida (white four-o'clock, pale umbrellawort, hairy four-o'clock); Mirabilis nyctaginea (wild four-o'clock, heart-leaved umbrellawort)
Nymphaeaceae: Nuphar advena (spatterdock, cowlily, yellow pond lily, yellow water lily); Nymphaea odorata (fragrant water lily, white water lily)
Oleaceae: Chionanthus virginicus (fringe tree, old man's beard); Forsythia suspensa (weeping forsythia); Ligustrum obtusifolium (border privet); Syringa vulgaris (common lilac)
Onagraceae: Circaea canadensis (enchanter's nightshade); Epilobium coloratum (purple-leaved willow herb, cinnamon willow herb); Ludwigia alternifolia (bushy seedbox); Ludwigia decurrens (erect primrose willow); Ludwigia leptocarpa (hairy primrose willow); Ludwigia microcarpa (small false loosestrife); Ludwigia palustris (water purslane); Ludwigia peploides (floating primrose willow, creeping primrose willow); Ludwigia polycarpa (water purslane); Oenothera biennis (common evening primrose); Oenothera clelandii (sand primrose); Oenothera curtiflora (velvety gaura); Oenothera filiformis (large-flowered gaura); Oenothera fruticosa (sundrops, narrowleaf evening primrose, shrubby sundrops); Oenothera kunthiana (Kunth's evening primrose); Oenothera laciniata (cut-leaved evening primrose, ragged evening primrose); Oenothera linifolia (sundrops, thread-leaved sundrops); Oenothera macrocarpa (Missouri evening primrose, Missouri primrose); Oenothera pilosella (sundrops, prairie sundrops); Oenothera rhombipetala (sand primrose); Oenothera speciosa (white evening primrose, showy evening primrose)
Ophioglossaceae: Sceptridium dissectum (cut-leaf grape fern)
Orchidaceae: Aplectrum hyemale (putty root, Adam and Eve orchid); Calopogon tuberosus (grass pink); Corallorhiza wisteriana (coral root); Cypripedium parviflorum (yellow lady's slipper orchid); Cypripedium reginae (showy lady's slipper); Epipactis helleborine (helleborine); Galearis spectabilis (showy orchis); Goodyera pubescens (downy rattlesnake plantain); Isotria verticillata (large whorled pogonia); Liparis liliifolia (large twayblade, lily twayblade); Malaxis unifolia (green adder's mouth); Platanthera ciliaris (yellow fringed orchid); Platanthera flava (pale green orchid, tubercled orchid); Platanthera lacera (ragged orchis, ragged orchid); Platanthera peramoena (purple fringeless orchid); Pogonia ophioglossoides (rose pogonia, snake mouth); Spiranthes cernua (common ladies' tresses, nodding ladies' tresses); Spiranthes lacera (slender ladies' tresses); Spiranthes magnicamporum (Great Plains ladies' tresses); Spiranthes ovalis (oval ladies' tresses); Spiranthes tuberosa (little ladies' tresses); Spiranthes vernalis (spring ladies' tresses, twisted ladies' tresses); Tipularia discolor (cranefly orchid); Triphora trianthophoros (three bird orchid, nodding pogonia)
Orobanchaceae: Agalinis auriculata (auriculate false foxglove); Agalinis fasciculata (fasiculate false foxglove); Agalinis gattingeri (rough-stemmed gerardia); Agalinis heterophylla (gerardia); Agalinis purpurea (smooth gerardia); Agalinis skinneriana (midwestern gerardia, pale gerardia); Agalinis tenuifolia (common gerardia, slender gerardia); Aureolaria flava (smooth false foxglove); Aureolaria grandiflora (large flowered false foxglove, big-flowered gerardia); Aureolaria pectinata (false foxglove); Buchnera americana (blue hearts); Castilleja coccinea (Indian paintbrush, painted cup, Indian blanket); Castilleja sessiliflora (downy painted cup); Dasistoma macrophyllum (mullein foxglove, false foxglove); Epifagus virginiana (beechdrops); Orobanche uniflora (one-flowered cancer-root, small cancer-root); Pedicularis canadensis (common lousewort, wood betony); Pedicularis lanceolata (swamp lousewort, swamp wood betony)
Osmundaceae: Osmunda cinnamomea (cinnamon fern); Osmunda regalis (royal fern)
Oxalidaceae: Oxalis dillenii (yellow wood sorrel, gray-green wood sorrel); Oxalis stricta (yellow wood sorrel); Oxalis violacea (violet wood sorrel, purple wood sorrel)
Papaveraceae: Argemone albiflora (white prickly poppy); Argemone mexicana (devil's fig, Mexican prickly poppy); Papaver rhoeas (corn poppy, field poppy, Shirley poppy); Sanguinaria canadensis (bloodroot, red puccoon); Stylophorum diphyllum (celandine poppy, wood poppy)
Parnassiaceae: Parnassia grandifolia (grass-of-Parnassus)
Passifloraceae: Passiflora incarnata (May pops, apricot vine, passion flower); Passiflora lutea (yellow passion flower)
Paulowniaceae: Paulownia tomentosa (royal paulownia empress tree, princess tree)
Penthoraceae: Penthorum sedoides (ditch stonecrop)
Phrymaceae: Mazus pumilus (mazus); Mimulus alatus (sharpwing monkey flower); Mimulus ringens (Allegheny monkey flower); Phryma leptostachya (American lopseed)
Phytolaccaceae: Phytolacca americana (pokeweed, poke)
Plantaginaceae: Bacopa rotundifolia (water hyssop); Callitriche heterophylla (greater water starwort); Chaenorhinum minus (dwarf snapdragon); Chelone glabra (white turtlehead); Chelone obliqua (rose turtlehead, pink turtlehead); Collinsia verna (blue-eyed Mary, eastern blue-eyed Mary); Collinsia violacea (violet collinsia, Ozarkian blue-eyed Mary); Gratiola neglecta (clammy hedge hyssop, hedge hyssop); Gratiola virginiana (round-fruited hedge hyssop, hedge hyssop); Kickxia elatine (cancer root, canker root); Leucospora multifida (narrowleaf paleseed, Obi-Wan-Conobea); Linaria dalmatica (Dalmatian toadflax); Linaria vulgaris (butter and eggs); Mecardonia acuminata (mecardonia); Nuttallanthus canadensis (blue toadflax, old-field toadflax); Nuttallanthus texanus (southern blue toadflax); Penstemon cobaea (cobaea beard-tongue, cobaea penstemon); Penstemon digitalis (smooth beard-tongue, tall white beard-tongue); Penstemon grandiflorus (large beard-tongue); Penstemon pallidus (pale beard-tongue); Penstemon tubaeflorus (trumpet beard-tongue); Plantago aristata (bracted plantain, buckhorn); Plantago cordata (heartleaf plantain); Plantago elongata (small plantain, slender plantain); Plantago lanceolata (English plantain, buckhorn, rib grass); Plantago patagonica (salt-and-pepper plant, Pursh plantain, Patagonian plantain); Plantago rugelii (Rugel's Plantain, broad-leaved plantain); Plantago virginica (hoary plantain, pale-seeded plantain); Plantago wrightiana (Wright's plantain); Veronica americana (American brooklime); Veronica anagallis-aquatica (water speedwell); Veronica arvensis (corn speedwell); Veronica catenata (water speedwell); Veronica hederifolia (ivy-leaved speedwell); Veronica peregrina (neckweed, purslane speedwell); Veronica persica (bird's-eye speedwell); Veronica polita (wayside speedwell); Veronica serpyllifolia (thyme-leaved speedwell); Veronica spicata (spiked speedwell); Veronica triphyllos (finger speedwell); Veronicastrum virginicum (culver's root)
Poaceae/Andropogoneae: Andropogon gerardi (big bluestem, turkeyfoot); Bothriochloa laguroides (silver bluestem, silver beardgrass); Microstegium vimineum (Japanese stiltgrass, eulalia); Sorghum bicolor (sorghum, sorgho, broom corn, Kafir corn, durra, feterita, chicken corn, Sudan grass, etc.); Sorghum halepense (Johnson grass); Tripsacum dactyloides (eastern gama grass)
Poaceae/Arundineae: Danthonia spicata (poverty grass, curly oat grass)
Poaceae/Aveneae: Aira caryophyllea (silver hairgrass); Aira elegans (hairgrass); Alopecurus pratensis (meadow foxtail); Phleum pratense (timothy)
Poaceae/Bambuseae: Arundinaria gigantea (giant cane)
Poaceae/Brachyelytreae: Brachyelytrum erectum (sang grass, bearded shorthusk)
Poaceae/Bromeae: Bromus inermis (smooth brome, Hungarian brome); Bromus pubescens (Canada brome)
Poaceae/Centotheceae: Chasmanthium latifolium (river oats, inland sea oats, wild oats, broadleaf spike grass)
Poaceae/Cynodonteae: Bouteloua curtipendula (sideoats grama); Bouteloua gracilis (blue grama); Bouteloua hirsuta (hairy grama); Buchloe dactyloides (buffalo grass); Chloris virgata (feather finger grass, showy chloris); Cynodon dactylon (Bermuda grass)
Poaceae/Eragrostideae: Eleusine indica (goose grass, yard grass); Eragrostis cilianensis (stink grass); Leptochloa panicea (red sprangletop, Mississippi spangletop); Leptochloa panicoides (Amazon sprangletop)
Poaceae/Meliceae: Melica nitens (three-flowered melic grass, Ladd's favorite)
Poaceae/Oryzeae: Leersia lenticularis (catchfly grass, oatmeal grass); Leersia oryzoides (rice cutgrass)
Poaceae/Paniceae: Cenchrus longispinus (sandbur); Dichanthelium boscii (Bosc's Panic Grass); Dichanthelium polyanthes (Many-Flowered Panic Grass); Dichanthelium scoparium (Velvety Panic Grass); Echinochloa crus-galli (barnyard grass, Japanese millet, Indian millet, billion dollar grass); Paspalum laeve (field paspalum); Paspalum pubiflorum (paspalum); Paspalum repens (horsetail paspalum, water paspalum); Paspalum urvillei (Vasey grass); Setaria faberi (nodding foxtail, Chinese foxtail, giant foxtail); Setaria viridis var. viridis (green foxtail); Urochloa platyphylla (broadleaf signalgrass)
Poaceae/Poeae: Dactylis glomerata (orchard grass); Lolium perenne (perennial rye grass, English rye grass, Italian rye grass); Poa annua (annual bluegrass); Poa bulbosa (bulbous bluegrass); Poa pratensis (Kentucky bluegrass)
Poaceae/Triticeae: Elymus hystrix (bottlebrush grass); Elymus villosus (downy wild rye); Elymus virginicus (Virginia wild rye); Hordeum pusillum (little barley); Hordeum vulgare (barley, beardless barley, pearl barley); Triticum aestivum (wheat)
Polemoniaceae: Collomia linearis (collomia); Phlox amplifolia (broadleaf phlox, longleaf phlox); Phlox bifida (cleft phlox, sand phlox); Phlox carolina ssp. angusta (smooth phlox); Phlox carolina ssp. carolina (smooth phlox); Phlox divaricata (blue phlox, wild sweet William); Phlox glaberrima (smooth phlox); Phlox maculata (wild sweet William, sweet William phlox, meadow phlox); Phlox paniculata (perennial phlox, summer phlox, garden phlox); Phlox pilosa (prairie phlox, downy phlox); Phlox subulata (moss phlox, moss pink, rock pink); Polemonium reptans (Jacob's ladder, Greek valerian)
Polygalaceae: Polygala incarnata (pink milkwort, slender milkwort); Polygala sanguinea (field milkwort, blood polygala); Polygala senega (Seneca snakeroot); Polygala verticillata (whorled milkwort)
Polygonaceae: Brunnichia ovata (ladies' eardrops, American buckwheat vine, redvine); Fallopia convolvulus (black bindweed, climbing buckwheat, wild buckwheat); Fallopia japonica (Japanese knotweed, Mexican bamboo, Japanese bamboo); Fallopia scandens (false buckwheat, crested buckwheat); Persicaria amphibia (water smartweed, shoestring smartweed, swamp smartweed); Persicaria arifolia (halberd-leaved tear-thumb); Persicaria bicornis (pink smartweed); Persicaria glabra (smartweed); Persicaria hydropiper (water pepper, smartweed); Persicaria hydropiperoides (wild water pepper, mild water pepper); Persicaria lapathifolia (pale smartweed); Persicaria longiseta (smartweed); Persicaria maculosa (lady's thumb, heart's ease, smartweed, heartweed); Persicaria pensylvanica (pinkweed, common smartweed, Pennsylvania smartweed); Persicaria punctata (water smartweed); Persicaria sagittata (arrow-leaved tear-thumb); Persicaria virginiana (Virginia knotweed, jumpseed); Polygonum americanum (jointweed); Polygonum erectum (erect knotweed); Polygonum ramosissimum (bushy knotweed, long-fruited knotweed); Polygonum tenue (slender knotweed); Rumex acetosella (sheep sorrel, red sorrel, field sorrel, sour dock); Rumex altissimus (tall dock, pale dock, peach-leaved dock); Rumex crispus (curly dock, sour dock, yellow dock); Rumex hastatulus (wild sorrel, sour dock, heartwing sorrel); Rumex obtusifolius (bitter dock, blunt-leaved dock, broad-leaved dock, red-veined dock); Rumex pulcher (fiddle dock); Rumex stenophyllus (narrow-leaved dock); Rumex verticillatus (swamp dock, water dock)
Polypodiaceae: Polypodium polypodioides (resurrection fern, gray polypody); Polypodium virginianum (common polypody)
Pontederiaceae: Heteranthera dubia (water star-grass); Heteranthera limosa (mud plantain); Heteranthera multiflora (mud plantain); Heteranthera rotundifolia (roundleaf mudplantain); Pontederia cordata (pickerel weed)
Portulacaceae: Claytonia virginica (Virginia spring beauty, spring beauty); Phemeranthus calycinus (fame flower, flame flower, rock pink, large flower-of-an-hour); Phemeranthus parviflorus (prairie fame flower, rock pink, small flower-of-an-hour); Portulaca grandiflora (portulaca, moss rose, rose moss); Portulaca oleracea (common purslane, pusley, pursley); Portulaca pilosa (purslane)
Primulaceae: Anagallis arvensis (scarlet pimpernel, poor man's weatherglass); Androsace occidentalis (western rock jasmine); Hottonia inflata (water violet, featherfoil); Lysimachia ciliata (fringed loosestrife); Lysimachia hybrida (loosestrife); Lysimachia lanceolata (loosestrife); Lysimachia nummularia (moneywort); Lysimachia quadriflora (narrow-leaved loosestrife); Primula fassettii (jeweled shooting star); Primula meadia (common shooting star, bird's bill, prairie rooster bill, American cowslip); Primula veris (English cowslip); Samolus parviflorus (water pimpernel, brookweed)
Pteridaceae: Adiantum capillus-veneris (southern maidenhair fern, Venus hair fern); Adiantum pedatum (northern maidenhair fern); Cheilanthes feei (slender lip fern); Pellaea atropurpurea (purple cliff brake)
Ranunculaceae: Actaea pachypoda (doll's eyes, white baneberry); Actaea racemosa (black cohosh, black snakeroot); Anemone canadensis (white anemone, meadow anemone); Anemone caroliniana (prairie anemone, Carolina anemone); Anemone virginiana (thimbleweed); Aquilegia canadensis (columbine, red columbine, wild honeysuckle); Caltha palustris (marsh marigold, cowslip); Ceratocephalus testiculatus (bur buttercup, hornseed buttercup); Clematis crispa (swamp leather flower, blue jasmine); Clematis fremontii (Fremont's leather flower); Clematis pitcheri (leather flower, bluebell); Clematis terniflora (virgin's bower); Clematis versicolor (pale leather flower, leather flower); Clematis virginiana (virgin's bower); Delphinium ajacis (garden larkspur, rocket larkspur); Delphinium carolinianum ssp. carolinianum (Carolina larkspur, wild blue larkspur); Delphinium carolinianum ssp. virescens (prairie larkspur); Delphinium consolida (garden rocket); Delphinium exaltatum (tall larkspur); Delphinium tricorne (dwarf larkspur); Hepatica acutiloba (sharp-lobed hepatica, sharp-lobed liverleaf); Hepatica americana (round-lobed hepatica, round-lobed liverleaf); Hydrastis canadensis (goldenseal); Isopyrum biternatum (false rue anemone); Myosurus minimus (mousetail); Ranunculus abortivus (small-flowered crowfoot, early wood buttercup); Ranunculus bulbosus (bulbous buttercup); Ranunculus fascicularis (early buttercup, prairie buttercup); Ranunculus ficaria (lesser celandine, pilewort); Ranunculus harveyi (Harvey's buttercup); Ranunculus hispidus (bristly buttercup, hispid buttercup, swamp buttercup); Ranunculus laxicaulis (water-plantain, spearwort); Ranunculus micranthus (rock buttercup); Ranunculus parviflorus (stickseed crowfoot, small-flowered crowfoot); Ranunculus pusillus (low spearwort); Ranunculus recurvatus (hooked crowfoot); Ranunculus sardous (hairy buttercup); Ranunculus sceleratus (cursed crowfoot); Thalictrum dasycarpum (purple meadow-rue); Thalictrum dioicum (early meadow-rue, quicksilver weed); Thalictrum revolutum (wax-leaved meadow-rue, waxy meadow-rue); Thalictrum thalictroides (rue-anemone); Trautvetteria caroliniensis (false bugbane)
Rhamnaceae: Berchemia scandens (supple-jack, rattan vine); Ceanothus americanus (New Jersey tea, wild snowball); Ceanothus herbaceus (redroot, inland New Jersey tea); Rhamnus caroliniana (Carolina buckthorn, Indian cherry); Rhamnus lanceolata (buckthorn)
Rosaceae: Agrimonia parviflora (swamp agrimony, many-flowered agrimony, harvest lice); Agrimonia pubescens (downy agrimony, soft agrimony); Agrimonia rostellata (woodland agrimony); Amelanchier arborea (downy serviceberry, downy shadbush, sarviss berry, sarviss tree, June berry, shadblow, sugar plum); Aphanes australis (parsley piert); Aronia melanocarpa (black chokeberry); Aruncus dioicus (goat's beard); Chaenomeles speciosa (common flowering quince, Japanese quince); Duchesnea indica (Indian strawberry); Filipendula rubra (queen of the prairie); Fragaria virginiana (wild strawberry); Geum aleppicum (yellow avens); Geum canadense (white avens, red root); Geum laciniatum (rough avens); Geum vernum (spring avens, early water avens); Geum virginianum (pale avens); Gillenia stipulata (midwestern Indian physic, American ipecac); Malus angustifolia (wild crab, narrow-leaved crab apple); Physocarpus opulifolius (ninebark); Potentilla canadensis (Canada cinquefoil, five finger); Potentilla fruticosa (shrubby cinquefoil); Potentilla norvegica (rough cinquefoil, Norwegian cinquefoil); Potentilla recta (rough-fruited cinquefoil, sulphur cinquefoil); Potentilla rivalis (brook cinquefoil); Potentilla simplex (common cinquefoil, old-field cinquefoil, five finger); Potentilla supina (bushy cinquefoil); Prunus americana (wild plum); Prunus hortulana (wild goose plum, hortulan plum); Prunus serotina (black cherry, wild cherry, rum cherry); Pyrus calleryana (Bradford pear); Rhodotypos scandens (jet bead); Rosa carolina (pasture rose); Rosa multiflora (multiflora rose, Japanese rose); Rosa palustris (swamp rose); Rosa rugosa (Japanese rose, rugosa rose); Rosa setigera (prairie rose, climbing rose); Rubus allegheniensis (Allegheny blackberry); Rubus argutus (highbush blackberry); Rubus flagellaris (northern dewberry); Rubus occidentalis (black raspberry); Spiraea alba (meadowsweet); Spiraea prunifolia (bridal wreath)
Rubiaceae: Cephalanthus occidentalis (buttonbush, globe flower, honeyball, pond dogwood); Diodia teres (rough buttonweed); Diodia virginiana (large buttonweed); Galium anglicum (bedstraw); Galium aparine (cleavers, goose grass, annual bedstraw); Galium arkansanum (Arkansas bedstraw); Galium boreale (northern bedstraw); Galium circaezans (forest bedstraw, licorice bedstraw); Galium concinnum (shining bedstraw); Galium obtusum (blunt-leaved bedstraw, wild madder); Galium odoratum (sweetscented bedstraw); Galium pedemontanum (bedstraw); Galium pilosum (hairy bedstraw); Galium tinctorium (southern three-lobed bedstraw); Galium triflorum (fragrant bedstraw); Galium virgatum (southwestern bedstraw); Houstonia caerulea (big bluets, Quaker ladies, innocence); Houstonia longifolia (long-leaved bluets, slender-leaved bluets); Houstonia nigricans (narrow-leaved bluets, diamond flowers); Houstonia purpurea (mountain houstonia, broad-leaved bluets); Houstonia pusilla (small bluets, star violet); Mitchella repens (partridge berry, twin berry); Sherardia arvensis (field madder); Spermacoce glabra (buttonweed)
Rutaceae: Ptelea trifoliata (common hop tree, stinking ash); Zanthoxylum americanum (common prickly ash, northern prickly ash, toothache tree)
Salicaceae: Salix interior (sandbar willow)
Santalaceae: Comandra umbellata (bastard toadflax)
Sapindaceae: Acer rubrum (red maple); Aesculus glabra (Ohio buckeye); Aesculus hippocastanum (horse chestnut ); Aesculus parviflora (bottlebrush buckeye, dwarf horse chestnut); Aesculus pavia (red buckeye); Cardiospermum halicacabum (common balloon vine, love in a puff)
Sapotaceae: Sideroxylon lanuginosum (gum bumelia, woolly buckthorn, chittim wood, false buckthorn, gum-elastic)
Saururaceae: Saururus cernuus (lizard's tail)
Saxifragaceae: Heuchera parviflora (small-flowered alum root); Heuchera richardsonii (prairie alum root); Micranthes pensylvanica (Forbes' saxifrage); Micranthes texana (saxifrage); Micranthes virginiensis (early saxifrage); Mitella diphylla (miterwort, bishop's cap); Saxifraga tridactylites (rueleaf saxifrage); Sullivantia sullivantii (sullivantia)
Scrophulariaceae: Buddleja davidii (common butterfly bush, orange eye, summer lilac); Scrophularia lanceolata (American figwort, early figwort); Scrophularia marilandica (eastern figwort, carpenter's square, late figwort); Verbascum blattaria (moth mullein); Verbascum thapsus (mullein, flannel plant)
Simaroubaceae: Ailanthus altissimus (tree-of-heaven, cancer tree, stinkweed)
Smilacaceae: Smilax bona-nox (greenbrier, catbrier, bullbrier); Smilax ecirrhata (carrion flower); Smilax hispida (bristly greenbrier, catbrier); Smilax lasioneura (carrion flower); Smilax pulverulenta (carrion flower)
Solanaceae: Datura stramonium (common jimsonweed); Physalis angulata (cutleaf ground cherry); Physalis heterophylla (clammy ground cherry); Physalis longifolia (common ground cherry); Physalis missouriensis (ground cherry); Physalis pubescens (downy ground cherry, annual ground cherry); Physalis pumila (prairie ground cherry); Physalis virginiana (Virginia ground cherry); Solanum carolinense (horse nettle, bull nettle); Solanum dulcamara (climbing nightshade, bitterwseet); Solanum elaeagnifolium (white horse nettle, silverleaf nightshade); Solanum nigrum (black nightshade); Solanum rostratum (buffalo bur, Kansas thistle); Solanum sarrachoides (hairy nightshade, viscid nightshade); Solanum tuberosum (potato)
Sparganiaceae: Sparganium americanum (bur-reed); Sparganium eurycarpum (giant bur-reed)
Staphyleaceae: Staphylea trifolia (American bladdernut)
Tetrachondraceae: Polypremum procumbens (juniper-leaf, rustweed)
Thymelaeaceae: Dirca decipiens (leatherwood); Dirca palustris (leatherwood)
Ulmaceae: Celtis occidentalis (northern hackberry, nettle tree)
Urticaceae: Boehmeria cylindrica (false nettle); Laportea canadensis (wood nettle); Parietaria pensylvanica (Pennsylvania pellitory, pellitory); Pilea fontana (lesser clearweed, clearweed); Pilea pumila (clearweed); Urtica chamaedryoides (nettle, weak nettle); Urtica dioica (tall nettle)
Valerianaceae: Valerianella locusta (corn salad, lamb's lettuce); Valerianella radiata (corn salad, lamb's lettuce)
Verbenaceae: Glandularia canadensis (rose verbena, rose vervain, eastern verbena); Lantana (lantana); Lippia lanceolata (northern fog fruit, northern frog fruit); Lippia nodiflora (common fog fruit, common frog fruit, turkey tangle); Verbena bracteata (creeping vervain, prostrate vervain); Verbena hastata (blue vervain); Verbena simplex (narrow-leaved vervain); Verbena stricta (hoary vervain); Verbena urticifolia (white vervain, nettle-leaved vervain)
Violaceae: Cubelium concolor (green violet); Viola arvensis (wild pansy, European field pansy); Viola bicolor (Johnny-jump-up, field pansy, wild pansy); Viola missouriensis (Missouri violet); Viola pallens (smooth white violet, northern white violet); Viola palmata (cleft violet, three-lobed violet); Viola papilionacea (common violet); Viola pedata (bird's foot violet, pansy violet, hens and roosters); Viola pubescens (yellow violet, smooth yellow violet); Viola sagittata (arrow-leaved violet, arrowhead violet); Viola sororia (common violet, meadow violet, butterfly violet); Viola striata (pale violet, cream violet); Viola tricolor (miniature pansy, Johnny-jump-up, heart's ease)
Viscaceae: Phoradendron leucarpum (eastern mistletoe, American Christmas mistletoe)
Vitaceae: Ampelopsis arborea (pepper vine); Ampelopsis cordata (raccoon grape, false grape, heartleaf ampelopsis); Parthenocissus quinquefolia (Virginia creeper, woodbine, five-leaved ivy); Parthenocissus vitacea (woodbine, thicket creeper); Vitis rupestris (sand grape)
Zygophyllaceae: Tribulus terrestris (puncture vine, caltrop)